The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
°C
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
O'Fallon, St. Louis, MO
Content continues below
Content continues below
Daily Historical Averages
April 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
20°
11
23°
12
27°
13
28°
14
29°
15
26°
16
23°
17
27°
18
21°
19
10°
20
12°
21
20°
22
24°
23
25°
24
26°
25
26
27
28
29
30
Forecast
Friday, April 10, 2026
Day
20°
Feels 20
Wind
14 km/h W
Gust
21 km/h
Humidity
62%
P.O.P
40%
Rain
<1 mm
Night
11°
Feels 10
Wind
11 km/h N
Gust
17 km/h
Humidity
88%
P.O.P
30%
Historical Averages
Apr 10
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.
April
Average Temperature
High
20°
Feels 20
Low
9°
Feels 8
Average Precipitation
11 Days
Rain amount
123mm
Snow amount
0.1cm